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WO2013003224A3 - Hydraulic control system having variable pressure relief - Google Patents

Hydraulic control system having variable pressure relief Download PDF

Info

Publication number
WO2013003224A3
WO2013003224A3 PCT/US2012/043733 US2012043733W WO2013003224A3 WO 2013003224 A3 WO2013003224 A3 WO 2013003224A3 US 2012043733 W US2012043733 W US 2012043733W WO 2013003224 A3 WO2013003224 A3 WO 2013003224A3
Authority
WO
WIPO (PCT)
Prior art keywords
control system
hydraulic control
circuit
valve
actuator
Prior art date
Application number
PCT/US2012/043733
Other languages
French (fr)
Other versions
WO2013003224A2 (en
Inventor
Aaron HO
Bryan Johnson
Nikhil JALGAONKAR
Original Assignee
Caterpillar Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Inc. filed Critical Caterpillar Inc.
Publication of WO2013003224A2 publication Critical patent/WO2013003224A2/en
Publication of WO2013003224A3 publication Critical patent/WO2013003224A3/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E02F9/2214—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing the shock generated at the stroke end
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5159—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/526—Pressure control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6653—Pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6654—Flow rate control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/85—Control during special operating conditions
    • F15B2211/853—Control during special operating conditions during stopping

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

A hydraulic control system (48) is disclosed. The hydraulic control system may have a pump (52) configured to pressurize a fluid, an actuator (26), a position sensor (102) associated with the actuator and configured to generate a first signal indicative of a position of the actuator, and a circuit (50) fluidly connecting the pump to the actuator. The hydraulic control system may also have a valve (55) associated with the circuit and configured to move from a first position, at which fluid relief from the circuit is inhibited, toward a second position, at which fluid is relieved from the circuit through the valve, when a pressure of fluid within the circuit exceeds a threshold setting of the valve. The hydraulic control system may additionally have a controller (58) in communication with the position sensor and the valve. The controller may be configured to selectively cause adjust the threshold setting of the valve based on the first signal.
PCT/US2012/043733 2011-06-28 2012-06-22 Hydraulic control system having variable pressure relief WO2013003224A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/170,482 US8899143B2 (en) 2011-06-28 2011-06-28 Hydraulic control system having variable pressure relief
US13/170,482 2011-06-28

Publications (2)

Publication Number Publication Date
WO2013003224A2 WO2013003224A2 (en) 2013-01-03
WO2013003224A3 true WO2013003224A3 (en) 2013-02-21

Family

ID=47389210

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/043733 WO2013003224A2 (en) 2011-06-28 2012-06-22 Hydraulic control system having variable pressure relief

Country Status (2)

Country Link
US (1) US8899143B2 (en)
WO (1) WO2013003224A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8886415B2 (en) * 2011-06-16 2014-11-11 Caterpillar Inc. System implementing parallel lift for range of angles
US20140067092A1 (en) * 2012-08-31 2014-03-06 Caterpillar Inc. Adaptive work cycle control system
FI124684B (en) * 2012-12-03 2014-12-15 Ponsse Oyj Crane
US20150167276A1 (en) * 2013-12-13 2015-06-18 Cnh America Llc Power beyond valve assembly for an agricultural implement
JP6368495B2 (en) * 2014-01-29 2018-08-01 株式会社小松製作所 Work vehicle and control method thereof
US9829014B2 (en) * 2015-04-27 2017-11-28 Caterpillar Inc. Hydraulic system including independent metering valve with flowsharing
JP6456277B2 (en) * 2015-12-18 2019-01-23 日立建機株式会社 Construction machinery
US10443628B2 (en) * 2016-10-26 2019-10-15 Deere & Company Boom control with integrated variable return metering
JP7156806B2 (en) 2018-02-23 2022-10-19 株式会社小松製作所 WORK VEHICLE AND CONTROL METHOD FOR WORK VEHICLE
JP7232691B2 (en) * 2019-03-29 2023-03-03 株式会社小松製作所 Work machine and work machine control method
AU2020223732A1 (en) * 2019-08-29 2021-03-18 The Raymond Corporation Variable hydraulic pressure relief systems and methods for a material handling device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0988126A (en) * 1995-09-20 1997-03-31 Seirei Ind Co Ltd Excavating machine
JP2007154478A (en) * 2005-12-02 2007-06-21 Shin Caterpillar Mitsubishi Ltd Blade operating mechanism
US20090255248A1 (en) * 2006-07-14 2009-10-15 Marcus Bitter Hydraulic Arrangement
WO2010054155A2 (en) * 2008-11-06 2010-05-14 Purdue Research Foundation System and method for pump-controlled cylinder cushioning

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937128A (en) 1973-11-02 1976-02-10 Caterpillar Tractor Co. Hydraulic control circuit with remotely controlled dual pressure relief valve
JPH05196004A (en) * 1992-01-20 1993-08-06 Komatsu Ltd Automatic cushioning controller for work machine cylinder
JP3460817B2 (en) 2000-06-28 2003-10-27 株式会社小松製作所 Hydraulic control device for hydraulic excavator
US6880332B2 (en) 2002-09-25 2005-04-19 Husco International, Inc. Method of selecting a hydraulic metering mode for a function of a velocity based control system
DE10256923B4 (en) * 2002-12-05 2013-10-24 Liebherr-France S.A. Method and device for motion damping of hydraulic cylinders of mobile machines
US6938535B2 (en) * 2002-12-13 2005-09-06 Caterpillar Inc Hydraulic actuator control
JP4096900B2 (en) 2004-03-17 2008-06-04 コベルコ建機株式会社 Hydraulic control circuit for work machines
US7165395B2 (en) * 2005-02-11 2007-01-23 Deere & Company Semi-active ride control for a mobile machine
US7555855B2 (en) * 2005-03-31 2009-07-07 Caterpillar Inc. Automatic digging and loading system for a work machine
US7905089B2 (en) 2007-09-13 2011-03-15 Caterpillar Inc. Actuator control system implementing adaptive flow control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0988126A (en) * 1995-09-20 1997-03-31 Seirei Ind Co Ltd Excavating machine
JP2007154478A (en) * 2005-12-02 2007-06-21 Shin Caterpillar Mitsubishi Ltd Blade operating mechanism
US20090255248A1 (en) * 2006-07-14 2009-10-15 Marcus Bitter Hydraulic Arrangement
WO2010054155A2 (en) * 2008-11-06 2010-05-14 Purdue Research Foundation System and method for pump-controlled cylinder cushioning

Also Published As

Publication number Publication date
US8899143B2 (en) 2014-12-02
US20130000288A1 (en) 2013-01-03
WO2013003224A2 (en) 2013-01-03

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